<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>
  <input type="button" value="选择" id="btn">
  <br>
  <select id="food">
    <option>烤肉</option>
    <option>拉面</option>
    <option>麻辣烫</option>
    <option>小龙虾</option>
    <option>火锅</option>
    <option>外卖</option>
  </select>
  <script>
  </script>
</body>

</html>